Abstract: In a light guide plate and a display apparatus having the light guide plate, a light guide plate includes reflective prisms, in which at least one of the reflective prisms includes an inclined angle adjustable according to an inclined surface of a defective portion thereof and compensates for a distortion of light caused by the defective portion.

Abstract: In a method of detecting a touch position, light is emitted. A plurality of light beams derived from the emitted light is received. The light beams have different paths from each other. The light beams are partially reflected according to a touch. The touch position is detected based on an amount of light in the received light beams. According to the present invention, the touch positions of several touching elements may be individually detected.

Abstract: A backlight unit includes a light source part, a light guide plate, a prism sheet, and a reflecting element. The light source part is configured to provide light. The light guide plate includes: a light incident portion disposed adjacent to the light source part, a corresponding portion spaced apart from and facing the light incident portion, a light exiting surface, and a bottom surface spaced apart from and facing the light exiting surface. A thickness of the light incident portion is greater than a thickness of the corresponding portion. The prism sheet is disposed on the light guide plate. The prism sheet includes a plurality of prisms extending toward the light guide plate. The reflecting element is disposed under the light guide plate. The reflecting element is configured to reflect at least some of the light toward the light guide plate.

Abstract: The backlight assembly includes a light source part and a light guide plate. The light source part generates a first light beam. The light guide plate has a plurality of light guide blocks. Each of the light guide blocks has a light incident surface, an opposite surface, a light emitting surface, and an inclined surface. The light incident surface receives the first light beam. The opposite surface is located opposite to the light incident surface, has a convex shape with respect to the light incident surface, and reflects the first light beam and converts the first light beam into a second light beam. The light emitting surface emits the second light beam. The inclined surface is inclined with respect to the light emitting surface.

Abstract: A display apparatus includes a light source and a light guide plate including a light incident surface facing the light source and which receive the light, an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape, connection surfaces at opposing sides of the light incident surface and which connect the light incident surface and the opposite surface, an upper surface connected to the light incident surface, the opposite surface and the connection surfaces and which outputs the light, and a lower surface opposite to the upper surface. The light incident surface of the light guide plate includes a first surface extending in a predetermined direction, and second surfaces inclined from the first surface in an area corresponding to the light source such that an optical recess having a polygonal pyramid shape is defined by the second surfaces.

Abstract: A light waveguide has a rectangular plate shape and is configured to totally reflect internal light arriving at an angle greater than a critical angle. Light emitting parts are disposed at corners of the light waveguide. Each of the light emitting parts emits light once in a period. A first light receiving part is disposed along a first side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to a second side surface facing the first side surface of the light waveguide. The second light receiving part is disposed along the second side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to the first side surface. A detecting part detects a touch position based on an amount of the light received by the first and second light receiving parts.

Abstract: The present invention relates to a touch module including a light emitting part, a light waveguide, a frustration layer, and a light receiving part. The light emitting part emits light and is disposed along a first direction. The light waveguide includes a first side surface and a second side surface and transmits light incident to the first side surface to the second side surface. The light emitting part is disposed on the first side surface, and the second side surface is disposed opposite to the first side surface along a second direction substantially perpendicular to the first direction. The frustration layer is disposed over the light waveguide and contacts the light waveguide in response to a touch to frustrate a total internal light reflection. The light receiving part is disposed on the second side surface of the light waveguide to detect a position of the touch.

Abstract: A light source assembly including a light source part, a light guide plate and a light-condensing sheet. The light source assembly generates light and includes at least one light source. The light guide plate includes an incident surface to which the light is incident, an opposing surface which is opposite to the incident surface, and an exiting surface which emits the light, and has a thickness which is gradually increased from the incident surface to the opposing surface. The light-condensing sheet includes a plurality of reverse prism patterns which protrude toward the exiting surface, extend along an arc of a circle, and are arranged in a concentric circle structure.

Abstract: In a light guide plate and a display apparatus having the light guide plate, a light guide plate includes reflective prisms, in which at least one of the reflective prisms includes an inclined angle adjustable according to an inclined surface of a defective portion thereof and compensates for a distortion of light caused by the defective portion.

Abstract: A touch display apparatus includes a first substrate, a second substrate, a light emitting part, a light receiving part and a light transmitting element. The second substrate faces the first substrate. The light emitting part is adjacent to a first side of the first substrate, and generates and emits light to the first substrate. The light receiving part is adjacent to a first side of the second substrate at a same side of the touch display apparatus as the first side of the first substrate, and receives light from the second substrate. The light transmitting element connects a second side of the first substrate opposing the first side of the first substrate to a second side of the second substrate opposing the first side of the second substrate.

Abstract: A backlight assembly includes; a light source including a light emitting surface through which a light exits and an optical member including a first surface disposed adjacent to the light source and a second surface disposed substantially opposite to the first surface, wherein the optical member covers the light source and guides the light therethrough, wherein the optical member includes; an incident surface to which the light is incident, the incident surface being connected with the first surface corresponding to the light source, an optical pattern disposed on the second surface and corresponding to the light source, the optical pattern reflecting a first light of the light incident through the incident surface through total internal reflection and a light guide pattern disposed on the first surface, wherein the light guide pattern directs the reflected first light to an exterior of the optical member.

Abstract: A display apparatus includes a light source and a light guide plate including a light incident surface facing the light source and which receive the light, an opposite surface opposite to the light incident surface and which reflects the light and has an arc shape, connection surfaces at opposing sides of the light incident surface and which connect the light incident surface and the opposite surface, an upper surface connected to the light incident surface, the opposite surface and the connection surfaces and which outputs the light, and a lower surface opposite to the upper surface. The light incident surface of the light guide plate includes a first surface extending in a predetermined direction, and second surfaces inclined from the first surface in an area corresponding to the light source such that an optical recess having a polygonal pyramid shape is defined by the second surfaces.

Abstract: A backlight unit includes a light source substrate on which a light source is mounted, a first light source plate which is disposed on the light source substrate and includes a cylindrical aperture corresponding to the light source, and a second light source plate which is disposed on the first light source plate and includes a partial transmission pattern on a bottom surface thereof. The partial transmission pattern corresponds to the aperture and allows part of light emitted from the light source to pass therethrough.

Abstract: A backlight assembly includes a plurality of light sources generating light, a light guide plate and a prism sheet. The light sources include first light sources and second light sources having a different emitting angle from the first light sources. The light guide plate includes an incident surface to which the light is incident, an exiting surface extended from the incident surface, opposing to the incident surface and emitting the incident light and an opposing surface extended from the exiting surface. The opposing surface meets the exiting surface at a substantially straight line. The prism sheet converts the emitted light from the light guide plate.

Abstract: The present invention provides a shutter pixel, a shutter structure including the shutter pixel, and an exposure apparatus including the shutter structure. The shutter pixel may include a lower substrate, an electrode disposed on the lower substrate, a spacer disposed on the edge of the electrode, a first mirror disposed on the spacer to be separated from the electrode and including a hole, an upper substrate disposed on the lower substrate to face the lower substrate, and a second mirror disposed at the upper substrate and overlapping the hole. Accordingly, a relatively simple structure may be provided.

Abstract: The backlight assembly includes a light source part and a light guide plate. The light source part generates a first light beam. The light guide plate has a plurality of light guide blocks. Each of the light guide blocks has a light incident surface, an opposite surface, a light emitting surface, and an inclined surface. The light incident surface receives the first light beam. The opposite surface is located opposite to the light incident surface, has a convex shape with respect to the light incident surface, and reflects the first light beam and converts the first light beam into a second light beam. The light emitting surface emits the second light beam. The inclined surface is inclined with respect to the light emitting surface.

Abstract: A backlight assembly includes; a light source including a light emitting surface through which a light exits and an optical member including a first surface disposed adjacent to the light source and a second surface disposed substantially opposite to the first surface, wherein the optical member covers the light source and guides the light therethrough, wherein the optical member includes; an incident surface to which the light is incident, the incident surface being connected with the first surface corresponding to the light source, an optical pattern disposed on the second surface and corresponding to the light source, the optical pattern reflecting a first light of the light incident through the incident surface through total internal reflection and a light guide pattern disposed on the first surface, wherein the light guide pattern directs the reflected first light to an exterior of the optical member.

Abstract: A light waveguide has a rectangular plate shape and is configured to totally reflect internal light arriving at an angle greater than a critical angle. Light emitting parts are disposed at corners of the light waveguide. Each of the light emitting parts emits light once in a period. A first light receiving part is disposed along a first side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to a second side surface facing the first side surface of the light waveguide. The second light receiving part is disposed along the second side surface of the light waveguide, and receives light emitted from the light emitting parts adjacent to the first side surface. A detecting part detects a touch position based on an amount of the light received by the first and second light receiving parts.

Abstract: A touch panel and a touch position detection method are presented. The touch panel includes: a touch unit, a light source unit array positioned along a first edge of the touch unit and including a first light source and a second light source; and a detection unit array positioned along a second edge and including a detection unit generating a detection signal by detecting light from the light source unit array. The first light source radiates light having a first optical axis, the first optical axis extending in a first direction that makes a first angle with respect to a reference direction, and the second light source radiates light having a second optical axis, the second optical axis extending in a second direction that makes the first angle with respect to the reference direction. The reference direction is perpendicular to the second edge.

Abstract: The present invention relates to a touch module including a light emitting part, a light waveguide, a frustration layer, and a light receiving part. The light emitting part emits light and is disposed along a first direction. The light waveguide includes a first side surface and a second side surface and transmits light incident to the first side surface to the second side surface. The light emitting part is disposed on the first side surface, and the second side surface is disposed opposite to the first side surface along a second direction substantially perpendicular to the first direction. The frustration layer is disposed over the light waveguide and contacts the light waveguide in response to a touch to frustrate a total internal light reflection. The light receiving part is disposed on the second side surface of the light waveguide to detect a position of the touch.